Re: [Discuss-gnuradio] [Douglas Geiger BBN 802.11b] Porting code on USRP2 problems

[Ben Yahmed]

Hello,

The USRP2 has a high data rate and it needs a lot of resources, I don't 
think that it is a good idea to run both USRP2's on one machine.

Ben Yahmed

Miklos Christine wrote:
> Hello,
>
> I don't encounter this problem anymore. Someone else was trying to 
> debug the code.
>
> I tried to run both USRP2's on one machine with 2 gigabit ethernet 
> ports. It did not seem to work.
> Does anyone know if it is possible to run both USRP2's on one machine?
>
> Thanks,
> Miklos Christine
>
> On Mon, May 11, 2009 at 1:45 AM, Ben Yahmed 
> <address@hidden 
> <mailto:address@hidden>> wrote:
>
>     Hi,
>
>     I do not encounter this problem, the simple_mac run in a correct
>     way for me. Do you use the latest versions of the firmware and fpga?
>
>     Ben Yahmed
>
>     Miklos Christine wrote:
>
>         Hello Ben,
>
>         When I try to run the version of simple_mac that you posted, I
>         get an error.
>         It seems like an infinite loop that prints to stdout:
>
>         2nstreams:  
>         It happens at the call to fg.rxpath.start() .
>
>         Do you have the same problem?
>
>         Thanks,
>         Miklos Christine
>
>         On Wed, May 6, 2009 at 10:46 AM, Ben Yahmed
>         <address@hidden
>         <mailto:address@hidden>
>         <mailto:address@hidden
>         <mailto:address@hidden>>> wrote:
>
>            Hi all,
>            I modified the gain in the bbn_80211_rx.py file from 46 to
>         27 and
>            the loss ratio has fallen down to 15-20%. Do you have any idea
>            about the best value to put?
>            this is the ping capture:
>
>
>            # ping 10.0.0.1        PING 10.0.0.1 (10.0.0.1) 56(84)
>         bytes of data.
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=1 ttl=64
>            time=51.9 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=2 ttl=64
>            time=52.0 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=3 ttl=64
>            time=52.0 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=4 ttl=64
>            time=49.2 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=5 ttl=64
>            time=49.4 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=6 ttl=64
>            time=46.3 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=7 ttl=64
>            time=45.7 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=10 ttl=64
>            time=35.2 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=12 ttl=64
>            time=35.1 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=13 ttl=64
>            time=34.3 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=15 ttl=64
>            time=32.5 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=16 ttl=64
>            time=33.0 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=17 ttl=64
>            time=29.7 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=18 ttl=64
>            time=29.8 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=19 ttl=64
>            time=28.7 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=20 ttl=64
>            time=28.1 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=21 ttl=64
>            time=27.2 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=22 ttl=64
>            time=25.8 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=23 ttl=64
>            time=24.2 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=24 ttl=64
>            time=23.6 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=25 ttl=64
>            time=22.4 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=26 ttl=64
>            time=20.4 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=27 ttl=64
>            time=21.5 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=28 ttl=64
>            time=11.1 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=29 ttl=64
>            time=10.9 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=30 ttl=64
>            time=10.2 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=31 ttl=64
>            time=11.3 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=32 ttl=64
>            time=11.2 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=33 ttl=64
>            time=10.7 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=34 ttl=64
>            time=11.2 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=36 ttl=64
>            time=9.74 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=38 ttl=64
>            time=11.2 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=39 ttl=64
>            time=10.7 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=40 ttl=64
>            time=11.2 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=41 ttl=64
>            time=10.8 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=44 ttl=64
>            time=9.83 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=45 ttl=64
>            time=10.4 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=47 ttl=64
>            time=9.91 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=48 ttl=64
>            time=10.1 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=49 ttl=64
>            time=11.1 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=50 ttl=64
>            time=10.4 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=51 ttl=64
>            time=10.4 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=52 ttl=64
>            time=10.7 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=53 ttl=64
>            time=10.0 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=54 ttl=64
>            time=16.3 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=55 ttl=64
>            time=10.1 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=56 ttl=64
>            time=10.6 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=58 ttl=64
>            time=9.69 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=60 ttl=64
>            time=10.2 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=62 ttl=64
>            time=9.91 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=63 ttl=64
>            time=10.3 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=65 ttl=64
>            time=11.0 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=67 ttl=64
>            time=10.1 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=68 ttl=64
>            time=11.0 ms
>            64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=69 ttl=64
>
>            time=15.5 ms
>
>            ^C
>            --- 10.0.0.1 ping statistics ---
>            69 packets transmitted, 55 received, 20% packet loss, time
>         68792ms
>            rtt min/avg/max/mdev = 9.695/20.881/52.076/13.669 ms
>
>
>            Ben Yahmed wrote:
>
>                Hi all,
>
>                I succeeded to make the simple_mac.py working. now it's
>                pinging correctly but with a huge loss ratio. At first I
>                disabled the carrier sense functions but after I
>         reactivated
>                them but I'm not sure these functions are working. I
>         attached
>                the 80211_mac folder so any suggestion or amelioration is
>                welcome. I used this command line to run the python file:
>                ./simple_mac.py -S 8 -v
>
>                I also hard_coded my mac adress so you need to change it
>                before use.
>
>
>                you can see here the results that I have obtained by ping:
>
>                address@hidden ~]# ping 10.0.0.1
>                PING 10.0.0.1 (10.0.0.1) 56(84) bytes of data.
>                From 10.0.0.2 icmp_seq=2 Destination Host Unreachable
>                From 10.0.0.2 icmp_seq=3 Destination Host Unreachable
>                From 10.0.0.2 icmp_seq=4 Destination Host Unreachable
>                From 10.0.0.2 icmp_seq=5 Destination Host Unreachable
>                From 10.0.0.2 icmp_seq=6 Destination Host Unreachable
>                From 10.0.0.2 icmp_seq=7 Destination Host Unreachable
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=17
>         ttl=64
>                time=7.66 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=24
>         ttl=64
>                time=15.3 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=29
>         ttl=64
>                time=7.57 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=33
>         ttl=64
>                time=8.12 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=42
>         ttl=64
>                time=7.63 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=49
>         ttl=64
>                time=8.13 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=55
>         ttl=64
>                time=7.67 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=56
>         ttl=64
>                time=7.74 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=57
>         ttl=64
>                time=7.61 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=69
>         ttl=64
>                time=8.10 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=70
>         ttl=64
>                time=8.11 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=76
>         ttl=64
>                time=8.06 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=77
>         ttl=64
>                time=8.14 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=80
>         ttl=64
>                time=7.56 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=87
>         ttl=64
>                time=7.55 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=90
>         ttl=64
>                time=7.50 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=96
>         ttl=64
>                time=7.64 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=97
>         ttl=64
>                time=7.99 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=100
>         ttl=64
>                time=8.20 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=101
>         ttl=64
>                time=8.13 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=102
>         ttl=64
>                time=7.96 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=104
>         ttl=64
>                time=8.03 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=111
>         ttl=64
>                time=7.63 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=124
>         ttl=64
>                time=8.14 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=126
>         ttl=64
>                time=7.61 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=130
>         ttl=64
>                time=7.69 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=131
>         ttl=64
>                time=7.67 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=132
>         ttl=64
>                time=7.61 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=139
>         ttl=64
>                time=7.87 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=140
>         ttl=64
>                time=7.86 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=142
>         ttl=64
>                time=7.59 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=146
>         ttl=64
>                time=8.17 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=150
>         ttl=64
>                time=7.85 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=151
>         ttl=64
>                time=7.68 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=157
>         ttl=64
>                time=7.95 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=161
>         ttl=64
>                time=7.76 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=169
>         ttl=64
>                time=8.22 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=171
>         ttl=64
>                time=8.07 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=176
>         ttl=64
>                time=8.13 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=180
>         ttl=64
>                time=8.19 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=181
>         ttl=64
>                time=7.73 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=182
>         ttl=64
>                time=8.04 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=183
>         ttl=64
>                time=8.09 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=187
>         ttl=64
>                time=8.18 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=190
>         ttl=64
>                time=7.94 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=210
>         ttl=64
>                time=8.03 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=211
>         ttl=64
>                time=7.84 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=213
>         ttl=64
>                time=7.61 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=216
>         ttl=64
>                time=7.86 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=221
>         ttl=64
>                time=7.96 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=224
>         ttl=64
>                time=7.82 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=225
>         ttl=64
>                time=7.74 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=229
>         ttl=64
>                time=7.78 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=236
>         ttl=64
>                time=8.00 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=238
>         ttl=64
>                time=7.98 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=246
>         ttl=64
>                time=16.4 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=253
>         ttl=64
>                time=7.53 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=270
>         ttl=64
>                time=8.42 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=275
>         ttl=64
>                time=8.22 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=276
>         ttl=64
>                time=8.14 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=284
>         ttl=64
>                time=8.03 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=296
>         ttl=64
>                time=7.65 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=302
>         ttl=64
>                time=8.00 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=306
>         ttl=64
>                time=7.66 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=311
>         ttl=64
>                time=7.59 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=322
>         ttl=64
>                time=8.06 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=327
>         ttl=64
>                time=8.01 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=331
>         ttl=64
>                time=8.02 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=332
>         ttl=64
>                time=7.75 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=341
>         ttl=64
>                time=8.28 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=349
>         ttl=64
>                time=8.23 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=350
>         ttl=64
>                time=8.27 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=351
>         ttl=64
>                time=7.87 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=352
>         ttl=64
>                time=7.90 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=359
>         ttl=64
>                time=7.92 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=360
>         ttl=64
>                time=7.95 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=368
>         ttl=64
>                time=7.86 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=371
>         ttl=64
>                time=14.7 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=372
>         ttl=64
>                time=7.61 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=376
>         ttl=64
>                time=7.95 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=387
>         ttl=64
>                time=8.14 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=391
>         ttl=64
>                time=8.14 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=392
>         ttl=64
>                time=8.27 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=393
>         ttl=64
>                time=7.88 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=407
>         ttl=64
>                time=8.18 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=410
>         ttl=64
>                time=7.68 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=418
>         ttl=64
>                time=8.19 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=439
>         ttl=64
>                time=7.60 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=450
>         ttl=64
>                time=7.59 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=465
>         ttl=64
>                time=7.54 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=470
>         ttl=64
>                time=7.58 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=479
>         ttl=64
>                time=8.08 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=482
>         ttl=64
>                time=7.96 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=498
>         ttl=64
>                time=8.15 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=499
>         ttl=64
>                time=8.14 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=514
>         ttl=64
>                time=8.06 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=522
>         ttl=64
>                time=7.57 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=527
>         ttl=64
>                time=7.95 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=531
>         ttl=64
>                time=8.08 ms
>                64 bytes from 10.0.0.1 <http://10.0.0.1>: icmp_seq=540
>         ttl=64
>
>                time=7.60 ms
>                ^C
>                --- 10.0.0.1 ping statistics ---
>                546 packets transmitted, 100 received, +6 errors, 81%
>         packet
>                loss, time 546190ms
>                rtt min/avg/max/mdev = 7.505/8.136/16.441/1.325 ms, pipe 3
>
>
>
>                Ben Yahmed
>
>              
>          ------------------------------------------------------------------------
>
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